Cylinder construction



Jan. 3, 1933. R, RAWLES E} M 1,892,852

CYLINDER CONSTRUCTION Filed Oct. 28, 1930 gwuewto'ai afaRan fas fill/1'71 redder Patented Jan. 3,1933 I 1 UNITE STATS PATENT caries GABNETT R. RAWLES AND ALVIN TEDDER, F MEMPHIS, TENNESSEE CYLINDER CONSTRUCTION Application filed October 28, 1930. Serial No. 491,772.

This invention relates to improvements in with the same efliciency as with a double packings and pertains particularly to an cylinder structure. improved method of preventing leakage The pistons 2 are connected by a rod 3 about the piston rod of engines. which, substantially midway between its The primary object of the present invenends, has formed integral therewith the setion is to provide an improved means or ries of bands or rings l between which are structure whereby leakage about the piston placed packing rings 5. The opposed heads rods of steam operated pistons is prevented of the cylinders 1 have secured thereto the and at the same time doing away with the plates 6 which are joined together by a sleeve usual packing, packing gland and stuffing 7, the interior of which is machined to form box. a smooth contact surface for the packing Another object of the invention is to pro rings 5.

vide an improved leakage preventing means These plates 6 are secured to the heads of about steam piston rods, which is of simpler the cylinders in any suitable manner such, for

construction than the packings and packing example, as by the use of tap screws 8, and

glands at present employed and at the same the structure is reinforced between the plates time does not cause the wearing of the rod 6 by longitudinally extending webs 9 which as packing glands do. connect the plates and join with the sleeve 7 The invention will be best understood from along their inner sides.

scription taken in connection with the 2.0- are provided with apertures 10 for the pascompanying drawing forming part of this sage of the piston rod, which apertures are specification, with the understanding, howof a size to snugly receive the rod. It will, ever, that the invention is not confined to any of course, be understood that even though the a consideration of the following detailed de- The adjacent ends or heads of the cylinders 3 25 strict conformity with the showing of the fit of the rod 3 in the apertures 10 is snug, still drawing but may be changed or modified so a loss of power would be had if some means long as such changes or modifications mark were not provided to prevent this, and this no material departure from the salient feais prevented by the employment of the packtures of the invention as expressed in the aping rings 5 upon the piston rod which work In the drawing course, covers the opening through which the Figure l is a view in longitudinal section rod passes. Loss of pressure between the conof a pair of cylinders showing the pistons tacting surfaces of the plates and the heads therein connected by a piston rod forming a of the cylinders is prevented by the formapart of the present invention. tion of a joint therebetween as indicated by 35 Figure 2 is a sectional view taken on the the numeral 11. line 2-2 of Figure 1. WVhile the invention has been shown ap- Referring more particularly to the drawplied to a double piston and cylinder strucing wherein like numerals of reference inture, it will, of course, be clear that it may dicate corresponding parts throughout the be efficiently employed in connection with several views, there is illustrated a pair of a single piston and cylinder structure as cylinders, each of which is indicated by the previously pointed out. Therefore, its use numeral 1, in which are positioned the usual is not to be restricted to a structure of the packing ring carrying pistons 2. lVhile the character illustrated 45 present invention has been shown in connec- Having thus described our invention, what tion with a pair of opposed cylinders and we claim is zpistons, it is, of course, to be understood that The combination with a pair of power it is not to be limited to such use for it will cylinders arranged in end opposed relation be readily obvious that it may be used in and each having a piston therein, of a body pended claim. snugly in the sleeve 7, the end of which, of 89 connection with a single cylinder and piston disposed between the cylinders and connecting the same and consisting of a pair of plates each being secured to an end of a cylinder and a sleeve connecting said plates and opening at each end through one of the same against the adjacent end of the cylinder, a piston rod having each end connected with a piston and passing from the cylinders through said sleeve, fixed ring members surrounding and in spaced relation on said rod midway of its ends said rod being of in at-erially smaller diameter than the interior or" the sleeve, packing rings carried b said rod and disposed between said fixed rings located in said sleeve for engagement with the surrounding wall thereof, and a reinforcing web extending longitudinally of the sleeve and formed integral therewith and further connecting said plates.

In testimony whereof we hereunto an' ix our signatures.

GARNET'l AFNLES. ALVIN TEDDER. 

